Description: The ule is essentially a st aightedge used to ule lines and the calib ated inst ument used fo dete mining measu ement is called a "measu e".This T iangula Scale is one ule with special funct...

Description: The ule is essentially a st aightedge used to ule lines and the calib ated inst ument used fo dete mining measu ement is called a "measu e".This Flexible Cu ve Rule is one Flexible plactic u...